Spreading anchor

Details Spreading anchor Spreading anchor

1998-08-10

1999-08-24

Wilson, Neill

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

Including sleeve and distinct tapered expander

411 30, 411 571, F16B 1304, F16B 1306

Patent

active

059416688

ABSTRACT:
A spreading anchor including an anchor rod (2) having, at its one end, a cone-shaped head portion (3) widening in a setting direction and, at its opposite end, a load application element, the anchor further including a sleeve (5, 16) surrounding the anchor rod (2) and having at its end adjacent to the head portion (3), an expansion section (7, 17) formed of a plurality of expansion tabs (9, 18) separated from each other by axially extending slots (8), and extending form a plastic hinge (11) in a direction toward the head portion (3), the expansion tabs (9) expanding radially upon relative displacement of the sleeve (5, 16) and the head portion (3), and the expansion tabs (9) having convexly curved, in the direction toward the head portion (3) free front edges (10, 19), with convexly curved free front edges (10, 19) of the expansion tab (9) forming, in a completely expanded position of the expansion tabs (9, 18), substantially arc sections of a circle (R).

REFERENCES:
patent: 3200692 (1965-08-01), Catlin
patent: 4702654 (1987-10-01), Frischmann et al.
patent: 4919579 (1990-04-01), Miyanaga
patent: 4968200 (1990-11-01), Mark
patent: 5314278 (1994-05-01), Weber
patent: 5332346 (1994-07-01), Shinjo
patent: 5419664 (1995-05-01), Hengesbach et al.

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